May 24
Morse Sends First Official Telegraph Message
Samuel Morse transmitted the biblical phrase 'What hath God wrought' from the U.S. Capitol to Baltimore on May 24, 1844, proving the viability of his electromagnetic telegraph over a 40-mile line.
Summary
By the early 1840s Samuel F.B. Morse had refined his electromagnetic telegraph system after years of experimentation and patent battles. Congress had appropriated funds in 1843 for a demonstration line connecting Washington, D.C., and Baltimore. On May 24, 1844, Morse transmitted the biblical phrase “What hath God wrought” from the U.S. Capitol to his collaborator Alfred Vail in Baltimore, roughly 40 miles away. The successful exchange before members of Congress proved the viability of long-distance electrical communication. Vail promptly replied with the same message, confirming the technology’s reliability.
Context
By the 1830s Samuel F. B. Morse had abandoned a struggling career as a painter and turned to invention after years of interest in electricity and electromagnetism. Working with partners including chemistry professor Leonard Gale and former student Alfred Vail, Morse refined a system that used coded electrical pulses sent over wire to transmit messages. He secured a U.S. patent caveat in 1837 and staged public demonstrations in New York and Philadelphia that showcased his dot-and-dash code.
What Happened
Morse sought federal support for a test line after earlier congressional interest stalled amid the financial panic of 1837. In 1843 Congress appropriated $30,000 for a demonstration connecting Washington and Baltimore. Morse and his team strung wire along the Baltimore & Ohio Railroad route, overcoming delays from weather and terrain. By April 1844 equipment was installed in a room in the Senate wing of the Capitol.
Aftermath
On May 24 Morse invited Annie Ellsworth, daughter of Patent Commissioner Henry L. Ellsworth, to select the opening message. She chose the phrase from Numbers 23:23. The transmission reached Vail in Baltimore, who immediately replied with the identical words. A follow-up public demonstration during the Democratic National Convention days later relayed real-time convention results to a crowd outside the Capitol, generating widespread excitement.
Legacy
Although Congress provided only temporary funding and soon turned the line over to private operators, the 1844 success launched commercial telegraph networks across the United States. Within two decades more than 100,000 miles of wire connected American cities, accelerating news, commerce, and national integration. The technology later inspired the telephone and laid conceptual groundwork for electronic communication systems that followed.
Why It Matters
The transmission launched commercial telegraphy in the United States and accelerated the global communications revolution, enabling near-instantaneous news, commerce, and military coordination. It laid groundwork for later innovations including the telephone and internet, fundamentally altering information flow and national integration.
Related Questions
Why did Morse choose the phrase 'What hath God wrought'?
The phrase was selected by Annie Ellsworth as a fitting expression of awe at the new technology's power.
Where exactly in the Capitol was the message sent from?
Contemporary records place the equipment in a room in the Senate wing; later accounts claiming the Old Supreme Court Chamber lack supporting documentation.
Did the U.S. government keep control of the telegraph?
Congress funded only a short test period before leasing the line to private operators in 1847.
How quickly did telegraph networks expand after 1844?
By the mid-1860s more than 100,000 miles of wire linked cities across the United States.
Related Portfolio Site
America 250 Atlas: Morse Sends First Official Telegraph Message is part of U.S. presidential, constitutional, or national civic history.
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Sources
- Morse’s Telegraph in the Capitol, United States Senate. Accessed 2026-07-10.